Sign in with ChatGPT OpenAI published documentation for "Sign in with ChatGPT," a feature that lets users sign in with ChatGPT and apply their ChatGPT plan to eligible AI requests inside third-party apps. The documentation covers account registration and sign-in through successful Responses API requests, and the docs index is available at llms.txt with markdown versions of pages accessible by appending .md to the page URL. Sign in with ChatGPT Let users sign in with ChatGPT and use their ChatGPT plan for eligible AI requests in your app. Get started Explore the documentation From account registration and sign-in to successful Responses API requests. For the complete documentation index, see llms.txt https://developers.openai.com/llms.txt . Markdown versions of documentation pages are available by appending .md to the page URL. Primary navigation DocsOverview - Agent Builder - Assistants API - Overview https://developers.openai.com/api/docs/guides/agents-api/overview - Quickstart https://developers.openai.com/api/docs/guides/agents-api/quickstart - API reference https://developers.openai.com/api/reference/resources/beta/subresources/agents - Architecture https://developers.openai.com/api/docs/guides/agents-api/architecture - Configuring Agents https://developers.openai.com/api/docs/guides/agents-api/configuration - Environments and sandboxes - Tools and integrations - Multi-agent https://developers.openai.com/api/docs/guides/agents-api/multi-agent - Observability and usage https://developers.openai.com/api/docs/guides/agents-api/observability - Tracing https://developers.openai.com/api/docs/guides/agents-api/tracing - Errors and recovery https://developers.openai.com/api/docs/guides/agents-api/errors - Bedrock Managed Agents https://developers.openai.com/api/docs/guides/agents-api/bedrock-managed-agents DocsSign in with ChatGPT - Overview https://developers.openai.com/codex/security - Codex Security CLI - TypeScript SDK https://developers.openai.com/codex/security/sdk - Codex Security Cloud DocsSelect... Loading docs agent...